The molecular weight for dexamethasone is 392.47. It is designated chemically as 9-fluoro-11β,17,21-
trihydroxy-16α-methylpregna-1,4-diene-3,20-dione. The empirical formula is C22H29FO5 and the structural
formula is:

Dexamethasone, a synthetic adrenocortical steroid, is a white to practically white, odorless, crystalline
powder. It is stable in air. It is practically insoluble in water.

What are the precautions when taking dexamethasone (Decadron)?

Before taking dexamethasone, tell your doctor or pharmacist if you are allergic to it; or to other corticosteroids (e.g., prednisone); or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

This medication should not be used if you have certain medical conditions. Before using this medicine, consult your doctor or pharmacist if you have: active fungal infections.